Backend basics for reviews
Reviews in activity feeds
Merge branch 'master' into reviews

Conflicts:
	templates/elements/activity_feed.html
First pass at reviews frontend
Style and bug fixes for reviews client
Merge branch 'master' into reviews
Corner case handling and bug fixes for reviews
Activity page filters
Improvements and bug fixes around reviews
Merge branch 'master' into reviews
Merge branch 'master' into reviews

Conflicts:
	static/js/reader.js
	templates/reader.html
Small changes to reviews
Basics of notifications
Reading notifications working client side
Merge pull request #92 from blockspeiser/tests

Tests
Likes for source sheets
Fix order of metrics data for graphs
Add pytest as requirement
--amend
Consolidate all DB connections across files